Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.

NTIS

06/23/1988

Collation

iii, 22 pages ; 28 cm

Abstract

A dry aerosol, consisting of submicrometer diatomaceous earth particles tagged with exp 131 I, was released over two different types of growing forage (alfalfa and Sudan grass) at the Experimental Dairy Farm on the Nevada Test Site. Following deposition of the aerosol, the two forage types were chopped and fed to different groups of lactating dairy cows. The dual objectives of the study were to evaluate the relationship of exp 131 I secretion in milk to the ingestion of different types of contaminated forage and to obtain a further indication of the possible influence on milk radioiodine levels of changing the particle size of the contaminant. The ratios of the peak activity concentrations measured in the milk to the peak activity concentrations in the forage were computed to be 0.0145 for the cows fed contaminated alfalfa and 0.0082 for those fed contaminated Sudan grass. Comparison of the results from this study with those from earlier studies indicates the major effect on activity levels in the milk can be related to forage type. Ingestion of Sudan grass by the cow reduces the transfer of radioiodine to milk by one half compared to ingestion of alfalfa.

Notes

"EMSL-LV-539-1." "Published August 1975." Cover title. "This research was performed as a part of the Bioenvironmental Research Program under memorandum of understanding no. AT(26-1)-539 for the Energy Research and Development Administration." Includes bibliographical references.